Do I need to read Marvel comics in order?
DC? Hell No.
Not really. Mostly because there are so many of them and it makes lesser and lesser sense the more it goes on. There is throughline, some unifying narrative in some of the series, but for the most part - it is a mess and it is getting messier and messier. Don't even try to attempt a line-wide read through and through. You will stop liking comics.
As such - it is reasonable to read event crossovers in order, but as for everything else - it mostly storyline to storyline. You can navigate through synopsises in order to understand whether you want to check it.
With that being said, there are several runs throughout Marvel history that are worth checking out in full.
I would suggest you to read following stuff in order:
- Steve Ditko's original Doctor Strange run
- Jack Kirby's run on Fantastic Four
- John Byrne's run on Fantastic Four
- Chris Claremont era of X-Men (with John Byrne's contributions)
- Larry Hama's Wolverine run
- Peter David's run on The Incredible Hulk
- Frank Miller's run on Daredevil
- Jim Steranko's Nick Fury stuff
- Brian Michael Bendis' Alias
- Roger Stern's run on Amazing Spider-man
- Chris Claremont's New Mutants
- John Byrne's Alpha Flight
- Moench / Sienkiewicz - Moon Knight
- Barry Windsor-Smith's Weapon X
- Walter Simonson's run on Thor
- Brian Michael Bendis' run on Ultimate Spiderman
Here's what I suggest: before starting, decide what you want to follow. The Avengers? Spider-Man? The X-men? and stick to that. You don't have to start at the beginning of them, but there are definitely places that are easiest to start. I would suggest trying to stay as close to the order from where you begin.